mainsail

noun

1. 主帆
   the largest and most important sail on a boat or ship

1. I will most likely be the mainsail trimmer.
   很有可能是主帆撂手。
2. The big moment had been delayed for more than two hours due to4m swells and a torn mainsail.
   但由于天气恶劣，海面上4米多高的海浪将帆船上的主帆给撕破了，这个重大的时刻也因此被推迟了两个多小时。
3. The boat will need at least one reef in the mainsail and a smaller jib.
   需要一个收缩点，前帆面积要小一些的。
4. A large triangular sail set on a spar that swings out opposite the mainsail, used on racing yachts when running before the wind.
   安装于船用圆材上的大三角帆，展开时与主帆相对，当赛艇顺风行驶时使用。
5. The jibs I speedily doused and brought tumbling to the deck; but the mainsail was a harder matter.
   我迅速放下三角帆扔到甲板上，但却难以对付主帆。

noun

1. the lowermost sail on the mainmast